/src/main/java/eu/etaxonomy/vaadin/mvp/AbstractEditorPresenter.java - Annotate - EDIT - EDIT Project Management

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cdm-vaadin/src/main/java/eu/etaxonomy/vaadin/mvp/AbstractEditorPresenter.java @ 55ecdf3a

1	0e7a9b4f	Andreas Kohlbecker	/**
2			* Copyright (C) 2017 EDIT
3			* European Distributed Institute of Taxonomy
4			* http://www.e-taxonomy.eu
5			*
6			* The contents of this file are subject to the Mozilla Public License Version 1.1
7			* See LICENSE.TXT at the top of this package for the full license terms.
8			*/
9			package eu.etaxonomy.vaadin.mvp;
10
11	fe785c1e	Andreas Kohlbecker	import org.hibernate.FlushMode;
12	9d5ae601	Andreas Kohlbecker	import org.springframework.beans.factory.annotation.Autowired;
13			import org.springframework.context.ApplicationEventPublisher;
14	0e7a9b4f	Andreas Kohlbecker	import org.springframework.context.event.EventListener;
15	7328ae26	Andreas Kohlbecker	import org.springframework.transaction.TransactionDefinition;
16	0e7a9b4f	Andreas Kohlbecker
17	96783004	Andreas Kohlbecker	import eu.etaxonomy.cdm.vaadin.event.AbstractEditorAction;
18	fe785c1e	Andreas Kohlbecker	import eu.etaxonomy.cdm.vaadin.session.ViewScopeConversationHolder;
19	538800b4	Andreas Kohlbecker	import eu.etaxonomy.vaadin.mvp.event.EditorDeleteEvent;
20	c46954e3	Andreas Kohlbecker	import eu.etaxonomy.vaadin.mvp.event.EditorPreSaveEvent;
21			import eu.etaxonomy.vaadin.mvp.event.EditorSaveEvent;
22	96783004	Andreas Kohlbecker	import eu.etaxonomy.vaadin.mvp.event.EditorViewEvent;
23	c46954e3	Andreas Kohlbecker
24	0e7a9b4f	Andreas Kohlbecker	/**
25	fe785c1e	Andreas Kohlbecker	*
26	0e7a9b4f	Andreas Kohlbecker	* @author a.kohlbecker
27			* @since Apr 5, 2017
28			*
29			*/
30	c46954e3	Andreas Kohlbecker	public abstract class AbstractEditorPresenter<DTO extends Object, V extends ApplicationView<?>> extends AbstractPresenter<V> {
31	0e7a9b4f	Andreas Kohlbecker
32	5ba148ae	Andreas Kohlbecker
33			private static final long serialVersionUID = -6677074110764145236L;
34
35	fe785c1e	Andreas Kohlbecker	FlushMode previousPreSaveEvenFlushMode = null;
36
37	9d5ae601	Andreas Kohlbecker	@Autowired
38			protected ApplicationEventPublisher eventBus;
39
40	fe785c1e	Andreas Kohlbecker	/**
41	55ecdf3a	Andreas Kohlbecker	* Load the bean to be edited in the editor freshly from the persistent storage.
42	fe785c1e	Andreas Kohlbecker	* Ore create an new empty instance in case the supplied <code>identifier</code> is <code>null</code>.
43			*
44			* @param identifier
45			* @return
46			*/
47			protected abstract DTO loadBeanById(Object identifier);
48
49	2a3d1ef0	Andreas Kohlbecker	/**
50			* This method is called directly before setting the bean as item data source to
51			* the field group of the editor.
52			* <p>
53			* Override this method to pre-process the bean if needed. This can be the case if
54			* you are using a persistence layer with short running session like Hibernate.
55			*
56			* @param bean
57			* @return
58			*/
59			protected DTO prepareAsFieldGroupDataSource(DTO bean){
60	fe785c1e	Andreas Kohlbecker
61	2a3d1ef0	Andreas Kohlbecker	return bean;
62			}
63
64	7328ae26	Andreas Kohlbecker	@Override
65			protected TransactionDefinition getTransactionDefinition(){
66			super.getTransactionDefinition();
67			if(definition.isReadOnly()){
68			definition.setReadOnly(false);
69			}
70			return definition;
71			}
72
73	fe785c1e	Andreas Kohlbecker	/**
74			* Regarding changing the Flush mode see see also {@link ViewScopeConversationHolder}
75			*
76			* @param preSaveEvent
77			*/
78	5ba148ae	Andreas Kohlbecker	@EventListener
79	538800b4	Andreas Kohlbecker	public void onEditorPreSaveEvent(EditorPreSaveEvent<DTO> preSaveEvent){
80	96783004	Andreas Kohlbecker	if(!isFromOwnView(preSaveEvent)){
81	437f2e6f	Andreas Kohlbecker	return;
82			}
83	fe785c1e	Andreas Kohlbecker	ensureBoundConversation();
84			previousPreSaveEvenFlushMode = getConversationHolder().getSession().getFlushMode();
85			getConversationHolder().getSession().setFlushMode(FlushMode.AUTO);
86
87	5ba148ae	Andreas Kohlbecker	}
88
89			/**
90	fe785c1e	Andreas Kohlbecker	* Regarding changing the Flush mode see see also {@link ViewScopeConversationHolder}
91	5ba148ae	Andreas Kohlbecker	*
92			* @param saveEvent
93			*/
94	0e7a9b4f	Andreas Kohlbecker	@EventListener
95	538800b4	Andreas Kohlbecker	public void onEditorSaveEvent(EditorSaveEvent<DTO> saveEvent){
96	96783004	Andreas Kohlbecker	if(!isFromOwnView(saveEvent)){
97	437f2e6f	Andreas Kohlbecker	return;
98			}
99	538800b4	Andreas Kohlbecker	DTO bean = saveEvent.getBean();
100	0e7a9b4f	Andreas Kohlbecker	saveBean(bean);
101	fe785c1e	Andreas Kohlbecker	getConversationHolder().getSession().setFlushMode(previousPreSaveEvenFlushMode);
102			previousPreSaveEvenFlushMode = null;
103	0e7a9b4f	Andreas Kohlbecker	}
104
105	538800b4	Andreas Kohlbecker	/**
106	fe785c1e	Andreas Kohlbecker	* Regarding changing the Flush mode see see also {@link ViewScopeConversationHolder}
107	538800b4	Andreas Kohlbecker	*
108			* @param saveEvent
109			*/
110			@EventListener
111			public void onEditorDeleteEvent(EditorDeleteEvent<DTO> deleteEvent){
112			if(!isFromOwnView(deleteEvent)){
113			return;
114			}
115	fe785c1e	Andreas Kohlbecker	if(!conversationBound){
116			bindConversation();
117			}
118			FlushMode previousFlushMode = getSession().getFlushMode();
119			getConversationHolder().getSession().setFlushMode(FlushMode.AUTO);
120	538800b4	Andreas Kohlbecker	deleteBean(deleteEvent.getBean());
121	fe785c1e	Andreas Kohlbecker	getConversationHolder().getSession().setFlushMode(previousFlushMode);
122	538800b4	Andreas Kohlbecker	}
123
124	96783004	Andreas Kohlbecker	/**
125			* @param saveEvent
126			* @return
127			*/
128			protected boolean isFromOwnView(EditorViewEvent saveEvent) {
129			return saveEvent.getView().equals(getView());
130			}
131
132	c46954e3	Andreas Kohlbecker	protected Class<V> getViewType() {
133			return (Class<V>) super.getView().getClass();
134			}
135
136	96783004	Andreas Kohlbecker	protected boolean isFromOwnView(AbstractEditorAction action){
137			return action.getSourceView() != null && getView().equals(action.getSourceView());
138			}
139
140	0e7a9b4f	Andreas Kohlbecker	protected abstract void saveBean(DTO bean);
141
142	538800b4	Andreas Kohlbecker	/**
143			* @param bean
144			*/
145			protected abstract void deleteBean(DTO bean);
146
147	0e7a9b4f	Andreas Kohlbecker	}

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